<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>es6app</title>
  <style>
    .target {
      width: 100px;
      height: 100px;
      background: #ccc;
      transition: .3s;
    }
    .target.hide {
      display: none;
    }
  </style>
</head>
<body>
  <div class="target"></div>
  <div class="control_wrap">
    <div>
      <button class="show">show/hide</button>
    </div>
    <div>
      <input type="text" class="bgcolor_input" placeholder="input background color" />
      <button class="bgcolor_btn">sure</button>
    </div>
    <div>
      <input type="text" class="bdcolor_input" placeholder="input border color" />
      <button class="bdcolor_btn">sure</button>
    </div>
    <div>
      <span>width</span>
      <button class="width_reduce">-5</button>
      <button class="width_add">+5</button>
    </div>
    <div>
      <span>height</span>
      <button class="height_reduce">-</button>
      <input type="text" class="height_input" readonly />
      <button class="height_add">+</button>
    </div>
  </div>
</body>
</html>